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Genetic bipolar

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https://www.readbyqxmd.com/read/29167880/association-between-schizophrenia-related-polygenic-liability-and-the-occurrence-and-level-of-mood-incongruent-psychotic-symptoms-in-bipolar-disorder
#1
Judith Allardyce, Ganna Leonenko, Marian Hamshere, Antonio F Pardiñas, Liz Forty, Sarah Knott, Katherine Gordon-Smith, David J Porteous, Caroline Haywood, Arianna Di Florio, Lisa Jones, Andrew M McIntosh, Michael J Owen, Peter Holmans, James T R Walters, Nicholas Craddock, Ian Jones, Michael C O'Donovan, Valentina Escott-Price
Importance: Bipolar disorder (BD) overlaps schizophrenia in its clinical presentation and genetic liability. Alternative approaches to patient stratification beyond current diagnostic categories are needed to understand the underlying disease processes and mechanisms. Objective: To investigate the association between common-variant liability for schizophrenia, indexed by polygenic risk scores (PRSs), and psychotic presentations of BD. Design, Setting, and Participants: This case-control study in the United Kingdom used multinomial logistic regression to estimate differential PRS associations across categories of cases and controls...
November 22, 2017: JAMA Psychiatry
https://www.readbyqxmd.com/read/29167159/niche-shifts-after-long-distance-dispersal-events-in-bipolar-sedges-carex-cyperaceae
#2
Tamara Villaverde, Pablo González-Moreno, Francisco Rodríguez-Sánchez, Marcial Escudero
PREMISE OF THE STUDY: Bipolar species represent the greatest biogeographical disjunction on Earth, raising many questions about the colonization and adaptive processes behind such striking distribution. We investigated climatic niche differences of five Carex bipolar species in North and South America to assess niche shifts between these two regions. Moreover, we assessed potential distribution changes with future climate change. METHODS: We used 1202 presence data points from herbarium specimens and 19 bioclimatic variables to assess climatic niche differences and potential distributions among the five species using ordination methods and Maxent...
November 22, 2017: American Journal of Botany
https://www.readbyqxmd.com/read/29167158/observations-on-bipolar-disjunctions-of-moonwort-ferns-botrychium-ophioglossaceae
#3
Donald R Farrar, Mary C Stensvold
Peter Raven, in 1963, included two fern taxa of the genus Botrychium in his list of plant species exhibiting American amphitropical bipolar disjunctions. He attributed the southern hemisphere occurrences to post-Pleistocene long-distance dispersal from counterparts in the northern hemisphere, probably assisted by annual bird migrations between the disjunct areas. Using genetic evidence gathered through worldwide analyses of phylogenetic relationship in Botrychium, we now review and reconsider Raven's conclusions...
November 22, 2017: American Journal of Botany
https://www.readbyqxmd.com/read/29163739/obsessive-compulsive-disorder-in-a-19-year-old-female-adolescent-with-turner-syndrome
#4
Surinder S Moonga, Aaron Pinkhasov, Deepan Singh
Obsessive-compulsive disorder (OCD) in patients with Turner syndrome (TS) is an uncommon neuropsychiatric presentation that has not been well characterized in the scientific literature. Though no clear psychiatric component is syndromic to TS, the clinical manifestations of certain neuropsychiatric disorders, including mood, anxiety and eating disorders, have all been well documented in patients with TS. However, the presence of OCD in these patients has not been previously described. This report details a 19-year-old TS patient who presented with OCD since the age of 13, comorbid with several other psychiatric pathologies, including bipolar I disorder, anorexia nervosa and attention deficit hyperactivity disorder (ADHD)...
December 2017: Journal of Clinical Medicine Research
https://www.readbyqxmd.com/read/29158582/the-camp-responsive-element-binding-creb-1-gene-increases-risk-of-major-psychiatric-disorders
#5
X Xiao, C Zhang, M Grigoroiu-Serbanescu, L Wang, L Li, D Zhou, T-F Yuan, C Wang, H Chang, Y Wu, Y Li, D-D Wu, Y-G Yao, M Li
Bipolar disorder (BPD), schizophrenia (SCZ) and unipolar major depressive disorder (MDD) are primary psychiatric disorders sharing substantial genetic risk factors. We previously reported that two single-nucleotide polymorphisms (SNPs) rs2709370 and rs6785 in the cAMP responsive element-binding (CREB)-1 gene (CREB1) were associated with the risk of BPD and abnormal hippocampal function in populations of European ancestry. In the present study, we further expanded our analyses of rs2709370 and rs6785 in multiple BPD, SCZ and MDD data sets, including the published Psychiatric Genomics Consortium (PGC) genome-wide association study, the samples used in our previous CREB1 study, and six additional cohorts (three new BPD samples, two new SCZ samples and one new MDD sample)...
November 21, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/29158579/rare-susceptibility-variants-for-bipolar-disorder-suggest-a-role-for-g-protein-coupled-receptors
#6
C Cruceanu, J-F Schmouth, S G Torres-Platas, J P Lopez, A Ambalavanan, E Darcq, F Gross, B Breton, D Spiegelman, D Rochefort, P Hince, J M Petite, J Gauthier, R G Lafrenière, P A Dion, C M Greenwood, B L Kieffer, M Alda, G Turecki, G A Rouleau
Bipolar disorder (BD) is a prevalent mood disorder that tends to cluster in families. Despite high heritability estimates, few genetic susceptibility factors have been identified over decades of genetic research. One possible interpretation for the shortcomings of previous studies to detect causative genes is that BD is caused by highly penetrant rare variants in many genes. We explored this hypothesis by sequencing the exomes of affected individuals from 40 well-characterized multiplex families. We identified rare variants segregating with affected status in many interesting genes, and found an enrichment of deleterious variants in G protein-coupled receptor (GPCR) family genes, which are important drug targets...
November 21, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/29144157/the-influence-of-sunlight-exposure-on-hospitalization-in-emergency-psychiatry
#7
Andrea Aguglia, Antonio Borsotti, Francesco Cuniberti, Gianluca Serafini, Mario Amore, Giuseppe Maina
OBJECTIVE: Environmental conditions during early life may affect individual vulnerability to both physiological changes as well as psychiatric conditions, especially in those with a genetic susceptibility. Among all factors, sunlight exposure intensity has a crucial effect on affecting circadian functions high-risk individuals. A potential explanation of this relation is that excessive sunlight exposure is able to impair biological mechanisms, possibly through the dysregulation of serotonin and/or melatonin production/metabolism...
November 16, 2017: Chronobiology International
https://www.readbyqxmd.com/read/29133423/gap-junctional-coupling-between-retinal-amacrine-and-ganglion-cells-underlies-coherent-activity-integral-to-global-object-perception
#8
Kaushambi Roy, Sandeep Kumar, Stewart A Bloomfield
Coherent spike activity occurs between widely separated retinal ganglion cells (RGCs) in response to a large, contiguous object, but not to disjointed objects. Since the large spatial separation between the RGCs precludes common excitatory inputs from bipolar cells, the mechanism underlying this long-range coherence remains unclear. Here, we show that electrical coupling between RGCs and polyaxonal amacrine cells in mouse retina forms the synaptic mechanism responsible for long-range coherent activity in the retina...
November 13, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29129507/the-use-of-polygenic-risk-scores-to-identify-phenotypes-associated-with-genetic-risk-of-schizophrenia-systematic-review
#9
REVIEW
Sumit Mistry, Judith R Harrison, Daniel J Smith, Valentina Escott-Price, Stanley Zammit
Studying the phenotypic manifestations of increased genetic liability for schizophrenia can increase our understanding of this disorder. Specifically, information from alleles identified in genome-wide association studies can be collapsed into a polygenic risk score (PRS) to explore how genetic risk is manifest within different samples. In this systematic review, we provide a comprehensive assessment of studies examining associations between schizophrenia PRS (SZ-PRS) and several phenotypic measures. We searched EMBASE, Medline and PsycINFO (from August 2009-14th March 2016) plus references of included studies, following PRISMA guidelines...
November 9, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/29121268/association-of-polygenic-score-for-schizophrenia-and-hla-antigen-and-inflammation-genes-with-response-to-lithium-in-bipolar-affective-disorder-a-genome-wide-association-study
#10
Azmeraw T Amare, Klaus Oliver Schubert, Liping Hou, Scott R Clark, Sergi Papiol, Urs Heilbronner, Franziska Degenhardt, Fasil Tekola-Ayele, Yi-Hsiang Hsu, Tatyana Shekhtman, Mazda Adli, Nirmala Akula, Kazufumi Akiyama, Raffaella Ardau, Bárbara Arias, Jean-Michel Aubry, Lena Backlund, Abesh Kumar Bhattacharjee, Frank Bellivier, Antonio Benabarre, Susanne Bengesser, Joanna M Biernacka, Armin Birner, Clara Brichant-Petitjean, Pablo Cervantes, Hsi-Chung Chen, Caterina Chillotti, Sven Cichon, Cristiana Cruceanu, Piotr M Czerski, Nina Dalkner, Alexandre Dayer, Maria Del Zompo, J Raymond DePaulo, Bruno Étain, Peter Falkai, Andreas J Forstner, Louise Frisen, Mark A Frye, Janice M Fullerton, Sébastien Gard, Julie S Garnham, Fernando S Goes, Maria Grigoroiu-Serbanescu, Paul Grof, Ryota Hashimoto, Joanna Hauser, Stefan Herms, Per Hoffmann, Andrea Hofmann, Stephane Jamain, Esther Jiménez, Jean-Pierre Kahn, Layla Kassem, Po-Hsiu Kuo, Tadafumi Kato, John Kelsoe, Sarah Kittel-Schneider, Sebastian Kliwicki, Barbara König, Ichiro Kusumi, Gonzalo Laje, Mikael Landén, Catharina Lavebratt, Marion Leboyer, Susan G Leckband, Alfonso Tortorella, Mirko Manchia, Lina Martinsson, Michael J McCarthy, Susan McElroy, Francesc Colom, Marina Mitjans, Francis M Mondimore, Palmiero Monteleone, Caroline M Nievergelt, Markus M Nöthen, Tomas Novák, Claire O'Donovan, Norio Ozaki, Urban Ösby, Andrea Pfennig, James B Potash, Andreas Reif, Eva Reininghaus, Guy A Rouleau, Janusz K Rybakowski, Martin Schalling, Peter R Schofield, Barbara W Schweizer, Giovanni Severino, Paul D Shilling, Katzutaka Shimoda, Christian Simhandl, Claire M Slaney, Alessio Squassina, Thomas Stamm, Pavla Stopkova, Mario Maj, Gustavo Turecki, Eduard Vieta, Julia Volkert, Stephanie Witt, Adam Wright, Peter P Zandi, Philip B Mitchell, Michael Bauer, Martin Alda, Marcella Rietschel, Francis J McMahon, Thomas G Schulze, Bernhard T Baune
Importance: Lithium is a first-line mood stabilizer for the treatment of bipolar affective disorder (BPAD). However, the efficacy of lithium varies widely, with a nonresponse rate of up to 30%. Biological response markers are lacking. Genetic factors are thought to mediate treatment response to lithium, and there is a previously reported genetic overlap between BPAD and schizophrenia (SCZ). Objectives: To test whether a polygenic score for SCZ is associated with treatment response to lithium in BPAD and to explore the potential molecular underpinnings of this association...
November 9, 2017: JAMA Psychiatry
https://www.readbyqxmd.com/read/29117282/association-of-genetic-risk-for-schizophrenia-and-bipolar-disorder-with-infant-neuromotor-development
#11
Fadila Serdarevic, Philip R Jansen, Akhgar Ghassabian, Tonya White, Vincent W V Jaddoe, Danielle Posthuma, Henning Tiemeier
No abstract text is available yet for this article.
November 8, 2017: JAMA Psychiatry
https://www.readbyqxmd.com/read/29116664/unraveling-the-biology-of-bipolar-disorder-using-induced-pluripotent-stem-derived-neurons
#12
REVIEW
Nathaniel D Miller, John R Kelsoe
OBJECTIVES: Bipolar disorder has been studied from numerous angles, from pathological studies to large-scale genomic studies, overall making moderate gains toward an understanding of the disorder. With the advancement of induced pluripotent stem (iPS) cell technology, in vitro models based on patient samples are now available that inherently incorporate the complex genetic variants that largely are the basis for this disorder. A number of groups are starting to apply iPS technology to the study of bipolar disorder...
November 8, 2017: Bipolar Disorders
https://www.readbyqxmd.com/read/29116126/development-of-multivariable-models-to-predict-change-in-body-mass-index-within-a-clinical-trial-population-of-psychotic-individuals
#13
Rebecca N S Harrison, Fiona Gaughran, Robin M Murray, Sang Hyuck Lee, Jose Paya Cano, David Dempster, Charles J Curtis, Danai Dima, Hamel Patel, Simone de Jong, Gerome Breen
Many antipsychotics promote weight gain, which can lead to non-compliance and relapse of psychosis. By developing models that accurately identify individuals at greater risk of weight gain, clinicians can make informed treatment decisions and target intervention measures. We examined clinical, genetic and expression data for 284 individuals with psychosis derived from a previously published randomised controlled trial (IMPACT). These data were used to develop regression and classification models predicting change in Body Mass Index (BMI) over one year...
November 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29112198/co-aggregation-of-major-psychiatric-disorders-in-individuals-with-first-degree-relatives-with-schizophrenia-a-nationwide-population-based-study
#14
C-M Cheng, W-H Chang, M-H Chen, C-F Tsai, T-P Su, C-T Li, S-J Tsai, J-W Hsu, K-L Huang, W-C Lin, T-J Chen, Y-M Bai
A previous genetic study has suggested that schizophrenia, bipolar disorder, major depressive disorder, autism spectrum disorder (ASD) and attention deficit hyperactivity disorder (ADHD) share common disease-associated genes. However, whether individuals with first-degree relatives (FDRs) with schizophrenia have a higher risk of these major psychiatric disorders requires further investigation. This study used Taiwan's National Health Insurance Research Database and identified 151 650 patients with schizophrenia and 227 967 individuals with FDRs with schizophrenia...
November 7, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/29108106/measurement-tools-for-assessment-of-older-age-bipolar-disorder-a-systematic-review-of-the-recent-global-literature
#15
Soham Rej, William Quayle, Brent P Forester, Annemiek Dols, Jennifer Gatchel, Peijun Chen, Sarah Gough, Rebecca Fox, Martha Sajatovic, Sergio A Strejilevich, Lisa T Eyler
OBJECTIVES: More than 50% of people with bipolar disorder will be age 60 years or older by 2030. There is a need for more data to guide assessment and treatment in older age bipolar disorder (OABD); however, interpretation of findings from small, single-site studies may not be generalizable and there are few large trials. As a step in the direction of coordinated large-scale OABD data collection, it is critical to identify which measurements are currently used and identify potential gaps in domains typically assessed...
November 6, 2017: Bipolar Disorders
https://www.readbyqxmd.com/read/29102411/what-can-mitochondrial-dna-analysis-tell-us-about-mood-disorders
#16
REVIEW
Takaoki Kasahara, Tadafumi Kato
Variants in mitochondrial DNA (mtDNA) and nuclear genes encoding mitochondrial proteins in bipolar disorder, depression, or other psychiatric disorders have been studied for decades, since mitochondrial dysfunction was first suggested in the brains of patients with these diseases. Candidate gene association studies initially resulted in findings compatible with the mitochondrial dysfunction hypothesis. Many of those studies, however, were conducted with modest sample sizes (N < 1000), which could cause false positive findings...
September 21, 2017: Biological Psychiatry
https://www.readbyqxmd.com/read/29084191/therapy-of-a-couple-with-a-bipolar-spouse
#17
Andrzej Witusik, Tadeusz Pietras
Qualitative analysis of therapy of a couple with a partner who has bipolar disorder is an important research paradigm in contemporary psychotherapy of mental disorders.The qualitative method of the study is important both from the cognitive point of view and for the evaluation of the therapeutic efficacy in the individual, idiographical aspect. AIM: The aim of the study is a qualitative analysis of the therapeutic process of a couple in which one partner suffers from bipolar affective disorder...
October 23, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29079688/heterozygosity-for-the-mood-disorder-associated-variant-gln460arg-alters-p2x7-receptor-function-and-sleep-quality
#18
Michael W Metzger, Sandra M Walser, Nina Dedic, Fernando Aprile-Garcia, Vladimira Jakubcakova, Marek Adamczyk, Katharine J Webb, Manfred Uhr, Damian Refojo, Mathias V Schmidt, Elisabeth Friess, Axel Steiger, Mayumi Kimura, Alon Chen, Florian Holsboer, Eduardo Arzt, Wolfgang Wurst, Jan M Deussing
A single-nucleotide polymorphism substitution from glutamine (Gln, Q) to arginine (Arg, R) at codon 460 of the purinergic P2X7 receptor (P2X7R) has repeatedly been associated with mood disorders. The P2X7R-Gln460Arg variant per se is not compromised in its function. However, heterologous expression of P2X7R-Gln460Arg together with wild-type P2X7R has recently been demonstrated to impair receptor function. Here we show that this also applies to humanized mice co-expressing both human P2X7R variants. Primary hippocampal cells derived from heterozygous mice showed an attenuated calcium uptake upon agonist stimulation...
October 27, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29079138/a-homer-1-gene-variant-influences-brain-structure-and-function-lithium-effects-on-white-matter-and-antidepressant-response-in-bipolar-disorder-a-multimodal-genetic-imaging-study
#19
Francesco Benedetti, Sara Poletti, Clara Locatelli, Elena Mazza, Cristina Lorenzi, Alice Vitali, Martina Riberto, Silvia Brioschi, Benedetta Vai, Irene Bollettini, Elisa Melloni, Veronica Aggio, Andrea Falini, Andrea De Bartolomeis, Cristina Colombo
BACKGROUND: The Homer family of postsynaptic scaffolding proteins plays a crucial role in glutamate-mediated synaptic plasticity, a phenotype associated with Bipolar Disorder (BD). Homer is a target for antidepressants and mood stabilizers. The AA risk genotype of the Homer rs7713917 A>G SNP has been associated with mood disorders and suicide, and in healthy humans with brain function. Despite the evidence linking Homer 1 gene and function to mood disorder, as well as its involvement in animal models of depression, no study has yet investigated the role of Homer in bipolar depression and treatment response...
October 27, 2017: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29068871/ank3-gene-polymorphisms-and-bipolar-disorder-a-meta-analysis
#20
Yang Roby
OBJECTIVE: Converging evidence has suggested ankyrin 3 (ANK3) as a risk gene for bipolar disorder (BD). However, association studies investigating its genetic variants and BD susceptibility have reported inconsistent results. In the present meta-analysis, we aimed to establish whether ANK3 single nucleotide polymorphisms (SNPs) confer increased risk for BD. METHODS: PubMed, Medline, PsycINFO, Embase, and Scopus were searched for literature published up to January 2017...
December 2017: Psychiatric Genetics
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